EP0332654B1 - Method of and machine for winding tubes from strip - Google Patents
Method of and machine for winding tubes from strip Download PDFInfo
- Publication number
- EP0332654B1 EP0332654B1 EP88900062A EP88900062A EP0332654B1 EP 0332654 B1 EP0332654 B1 EP 0332654B1 EP 88900062 A EP88900062 A EP 88900062A EP 88900062 A EP88900062 A EP 88900062A EP 0332654 B1 EP0332654 B1 EP 0332654B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- core
- annular space
- locking
- convolutions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/566—Winding and joining, e.g. winding spirally for making tubular articles followed by compression
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/78—Winding and joining, e.g. winding spirally helically using profiled sheets or strips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/80—Component parts, details or accessories; Auxiliary operations
- B29C53/82—Cores or mandrels
- B29C53/821—Mandrels especially adapted for winding and joining
- B29C53/825—Mandrels especially adapted for winding and joining for continuous winding
- B29C53/827—Mandrels especially adapted for winding and joining for continuous winding formed by several elements rotating about their own axes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
- B29C65/5035—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being in thread form, i.e. in the form of a single filament, e.g. in the form of a single coated filament
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
- B29C65/5092—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the tape handling mechanisms, e.g. using vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
- B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/49—Internally supporting the, e.g. tubular, article during joining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
- B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
- B29C66/83411—Roller, cylinder or drum types
- B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/481—Non-reactive adhesives, e.g. physically hardening adhesives
- B29C65/4815—Hot melt adhesives, e.g. thermoplastic adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
- B29C66/4329—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms the joint lines being transversal but non-orthogonal with respect to the axis of said tubular articles, i.e. being oblique
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/84—Specific machine types or machines suitable for specific applications
- B29C66/841—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions
- B29C66/8414—Machines or tools adaptable for making articles of different dimensions or shapes or for making joints of different dimensions of different diameter
Definitions
- This invention relates to a method of, and machine for, winding tubes from strip.
- EP-A-0 025 971 also relates to a machine for the continuous manufacture of plastic tubes by helical winding and discloses a machine for winding tubes from a strip of a resilient material having longitudinal side flanges with integrated interconnecting means.
- the known machine comprises a cylindrical core, means for rotating the core, an annular sleeve coaxially about the core and forming an annular space between them, an inlet opening in the sleeve to the annular space and means (Fig. 4) for guiding a strip through the inlet opening to the annular space.
- the present invention has been devised with the general objects of providing a machine which is particularly efficient in the production of tubes wound from strip, and a method of making such tubes.
- the objects of this invention at least essentially can be achieved by providing a series of ribbed pressure rollers mounted on said sleeve in a helical path and entering the annular space to press a separate locking strip into locking engagement about the adjacent side flanges of the convolutions.
- the invention resides broadly, in one aspect, in a machine for winding tubes from strip of resilient material having longitudinal side flanges and a series of spaced longitudinal flanges and interlocking the side flanges by a longitudinal recessed locking strip of resilient material, which machine includes a base; a substantially cylindrical core mounted rotatably on the base and defining the internal diameter of a tube to be formed; means for rotating the core; an annular outer sleeve mounted on the base coaxially about the core and forming an annular space between them; an inlet opening in the sleeve to the annular space; means for guiding a tube forming strip through the inlet opening to the annular space; a series of pressure rollers mounted on the sleeve in a helical path and entering the annular space to urge the strip into frictional engagement with the rotating core and to guide it to form about the core a helix with closely adjacent convolutions; means for guiding a longitudinal recessed locking strip of
- Means are preferably provided for introducing glue to the longitudinal groove or recess of the locking strip before its entry to the inlet opening.
- the core and the assembly of the outer sleeve and pressure rollers are preferably interchangeable with others for the production of tubes of different diameters.
- the machine illustrated includes an upright base plate 10 having at its top corners shackles 11 to which are attached cables 12 from a winch or the like (not shown) by means of which the machine may be lifted and lowered, for example, into a man-hole.
- the base plate 10 is apertured to accept the housing 13 for the bearings of a main shaft 14, the housing extending forwarddly of the base plate 10 and having a peripheral flange 15 bolted to the rear face of the base plate.
- a double sprocket 16 is keyed on the rear end of the main shaft 14, and an annular mounting plate 17 is welded or otherwise secured on the front part of the shaft.
- a cylindrical outer sleeve 18 is fixed on the front face of the base plate 10, coaxially with the main shaft 14, the sleeve having at its rear end an internal flange 19 which is bolted to the base plate.
- the bottom of the outer sleeve 18 is level with the bottom edge of the base plate 10.
- a cylindrical core 20 is rotatably mounted coaxially within the outer sleeve 18 so that an annular space 21 is formed between them.
- the core is divided by an annular median plate 22, which is engaged on the front end of the main shaft 14 and bolted to its mounting plate 17.
- a section of the periphery of the core 20 is slightly reduced in diameter to form a seating for a rubber or like girdle 23, formed with a tread which is hereinafter described, and which has an outer diameter slightly greater than that of the remainder of the core 20, the surface of which, in front of the girdle, is of polished steel.
- a hydraulic motor 24 is mounted in front of the base plate 10 on an adjustable carrier bracket 25, the motor shaft 26 passing through a slotted hole in the carrier plate to carry, behind the base plate, a double sprocket 27 connected by endless chains 28 to the double sprocket 16 on the main shaft 14.
- the motor shaft 26 also carries a sprocket 29 connected by a chain 30 to a sprocket 31 on the shaft of a glue pump 32 mounted on a bracket 33 fixed on the front of the base plate 10.
- the outer sleeve 18 is formed with a series of openings 34 arranged in a helical path about the sleeve. At both ends of each of these openings, there are provided bearing blocks 35 for the shaft 36 of a pressure roller 37, shown more particularly in FIG. 5.
- Each of these pressure rollers which may be of a tough resilient plastics material, is formed with a series of equally spaced circumferential grooves 38 separated by annular ribs 39 of which two succeeding ribs, indicated at 39a, are of somewhat lesser diameter than the others.
- Each of the rollers 37 extends for some distance through its opening 34 to approach, but not contact, the rotatable core 20.
- the roller shafts 36 are engaged in the bearing blocks 35 for adjustment, radially with respect to the core 20, by means of adjustment screws 40.
- the tube forming strip 41 shown in section in FIG. 5, is an extruded strip with a base 42 with side flanges 43 having hooked extremities, and with a series of T-section flanges 44 between the side flanges 43 in equally spaced arrangement corresponding to the spacing of the pressure roller grooves 38.
- a roll (not shown) of the tube forming strip 41 may be carried on a reel (not shown), from which an end of the strip is carried to a strip guide 45 mounted in front of the base plate 10, in laterally adjustable manner, on a pair of brackets 46.
- the strip guide 45 directs the tube forming strip downwards and more or less tangentially, with respect to the outer sleeve 18, to pass through the opening 34 of one of the pressure rollers 37 and between that pressur roller and the rotatable core 20.
- the strip guide 45 is also arranged obliquely, as shown in FIG. 1, to direct the tube forming strip to the helical path along which the pressure rollers 37 are arranged and onto that part of the core 20 encircled by the rubber or like girdle 23.
- the tread of this girdle is in the form of grooves which are substantially parallel to the axes of the pressure rollers 37.
- Rotation of the core 20 causes the tube forming strip 41 to pass around the core in a helical path so that, after the completion of one rotation of the core 20 two parts of the strip lie closely adjacent, as shown in FIG. 5, the adjacent hooked side flanges 43 of the two parts of the strip being located in the groove 38 between the two reduced-diameter annular ribs 39a of a pressure roller 37.
- the opening 34 through which the tube forming strip 41 is introduced from the strip guide 45 is of increased width, as shown in FIG. 1, to give easy entry; and the far edge of each of the openings 34 is bent outwardly, as shown particularly at 46 in FIG. 3, to ensure that the strip, during its travel, does not become blocked, but is guided between the core 20 and the outer sleeve 18.
- a locking strip 47 which may be fed from a reel (not shown) to a locking strip guide 48 adjacent to the strip guide 45.
- the locking strip 47 as shown in FIGS. 5 and 6, is of open arrow-head configuration, with oppositely directed base flanges, and is capable of being pressed down onto, and locking together, the two adjacent hooked side flanges 43 of the two parts of the tube forming strip 41.
- the locking strip is applied by feeding it, from the locking strip guide 48, through the opening 34 of the first of the pressure rollers 37 and between its annular ribs 39a, the reduced diameters of which allow for the thickness of the base flanges of the locking strip superimposed on the base portions 42 of the adjacent tube forming strips 41.
- glue be introduced into the open arrow-head part of the locking strip. This is done by a glue nozzle 49 extending radially into the round-section passage 50 in the locking strip guide 48 through which the locking strip passes.
- the glue pump 32 draws glue from a reservoir (not shown) by way of a hose 51 and delivers it under pressure to the nozzle through a hose 52.
- the helically wound tube forming strip 41 With continued rotation of the core 20 the helically wound tube forming strip 41, its adjacent convolutions locking and adhesively secured together by the locking strip 47, form, between the rotating core 20 and the outer sleeve 18, a tube of which the internal diameter is determined by the diameter of the core.
- This tube as it is formed, is expelled from the open end of the outer sleeve 18, the treaded girdle 23 preventing circumferential slippage on the core but allowing axial slippage of the formed tube over the core's girdle and its polished front part.
- the working parts of the machine behind the base plate 10 are shielded by a chain guard 53.
- the machine may be used to line a sewer.
- the machine may be lowered by a winch or the like into a manhole, aligned with the sewer, and put into operation to form a lining tube which is impelled forwardly into the sewer. Because of its compact form the machine can be installed for this purpose without deepening or widening the manhole.
- the machine may be quickly and easily modified by the interchanging of the core 20 and outer sleeve 18 (with its associated parts) for others of larger or smaller diameter.
- the core may be removed by unbolting its median plate 22 from the main shaft flange 17, and the outer sleeve may be removed by unbolting its internal flange 19 from the base plate 10.
Abstract
Description
- This invention relates to a method of, and machine for, winding tubes from strip.
- Australian Patent No. 530,251 and Patent Application No. 15562/83, both in the name of Rib Loc Hong Kong Ltd. disclose machines for producing tubes of helically wound extruded plastic strip having at its side complementary rib and groove formations which, in successive convolutions of the helix, are caused to interlock by a joining roller.
- EP-A-0 025 971 also relates to a machine for the continuous manufacture of plastic tubes by helical winding and discloses a machine for winding tubes from a strip of a resilient material having longitudinal side flanges with integrated interconnecting means. The known machine comprises a cylindrical core, means for rotating the core, an annular sleeve coaxially about the core and forming an annular space between them, an inlet opening in the sleeve to the annular space and means (Fig. 4) for guiding a strip through the inlet opening to the annular space.
- The present invention has been devised with the general objects of providing a machine which is particularly efficient in the production of tubes wound from strip, and a method of making such tubes.
- Other objects achievable in preferred embodiments of the invention are to provide such a machine which may be quickly and easily modified to produce such tubes of different diameters, which is particularly compact and so well suited for lowering into a manhole for the production of a tube projected as a liner into a sewer, and which, though simple and economical to manufacture, is sturdy and durable in use.
- In those above respects we have found that in relation to the machine of EP-A-0 025 971 the objects of this invention at least essentially can be achieved by providing a series of ribbed pressure rollers mounted on said sleeve in a helical path and entering the annular space to press a separate locking strip into locking engagement about the adjacent side flanges of the convolutions.
- With the foregoing and other objects in view, the invention resides broadly, in one aspect, in a machine for winding tubes from strip of resilient material having longitudinal side flanges and a series of spaced longitudinal flanges and interlocking the side flanges by a longitudinal recessed locking strip of resilient material, which machine includes a base; a substantially cylindrical core mounted rotatably on the base and defining the internal diameter of a tube to be formed; means for rotating the core; an annular outer sleeve mounted on the base coaxially about the core and forming an annular space between them; an inlet opening in the sleeve to the annular space; means for guiding a tube forming strip through the inlet opening to the annular space; a series of pressure rollers mounted on the sleeve in a helical path and entering the annular space to urge the strip into frictional engagement with the rotating core and to guide it to form about the core a helix with closely adjacent convolutions; means for guiding a longitudinal recessed locking strip of resilient material as locking means for locking together the said adjacent convolutions through the inlet opening to the adjacent convolutions of the tube forming strip; and a series of spaced circumferential grooves, separated by annular ribs, about the pressure rollers, in which the spaced longitudinal flanges can be engaged and thereby guided; the pressure rollers being arranged to press the locking strip into locking engagement about the adjacent side flanges of the convolutions.
- Means are preferably provided for introducing glue to the longitudinal groove or recess of the locking strip before its entry to the inlet opening.
- The core and the assembly of the outer sleeve and pressure rollers are preferably interchangeable with others for the production of tubes of different diameters.
- Other features of the invention will become apparent from the following description.
- In order that a preferred embodiment of the invention may be readily understood and carried into practical effect, reference is now made to the accompanying drawings, wherein:
- Figure 1 is a partly broken-away side elevational view of a machine according to the invention;
- FIG. 2 is a partly broken-away plan view of the machine;
- FIG. 3 is an end elevational view of the machine;
- FIG. 4 is a sectional view of the lower part of the machine taken along line 4-4 in FIG. 2;
- FIG. 5 is a detail drawing, to enlarged scale, of a pressure roller of the machine and strips interlocked thereby; and
- FIG. 6 is a sectional view, to larger scale, along line 6-6 in FIG. 1.
- The machine illustrated includes an
upright base plate 10 having at its top corners shackles 11 to which are attachedcables 12 from a winch or the like (not shown) by means of which the machine may be lifted and lowered, for example, into a man-hole. - The
base plate 10 is apertured to accept thehousing 13 for the bearings of amain shaft 14, the housing extending forwarddly of thebase plate 10 and having a peripheral flange 15 bolted to the rear face of the base plate. - A
double sprocket 16 is keyed on the rear end of themain shaft 14, and anannular mounting plate 17 is welded or otherwise secured on the front part of the shaft. - A cylindrical
outer sleeve 18 is fixed on the front face of thebase plate 10, coaxially with themain shaft 14, the sleeve having at its rear end aninternal flange 19 which is bolted to the base plate. The bottom of theouter sleeve 18 is level with the bottom edge of thebase plate 10. - A
cylindrical core 20 is rotatably mounted coaxially within theouter sleeve 18 so that anannular space 21 is formed between them. The core is divided by an annularmedian plate 22, which is engaged on the front end of themain shaft 14 and bolted to itsmounting plate 17. A section of the periphery of thecore 20 is slightly reduced in diameter to form a seating for a rubber or likegirdle 23, formed with a tread which is hereinafter described, and which has an outer diameter slightly greater than that of the remainder of thecore 20, the surface of which, in front of the girdle, is of polished steel. - A
hydraulic motor 24 is mounted in front of thebase plate 10 on anadjustable carrier bracket 25, themotor shaft 26 passing through a slotted hole in the carrier plate to carry, behind the base plate, adouble sprocket 27 connected by endless chains 28 to thedouble sprocket 16 on themain shaft 14. Themotor shaft 26 also carries asprocket 29 connected by achain 30 to asprocket 31 on the shaft of aglue pump 32 mounted on abracket 33 fixed on the front of thebase plate 10. - The
outer sleeve 18 is formed with a series ofopenings 34 arranged in a helical path about the sleeve. At both ends of each of these openings, there are provided bearingblocks 35 for theshaft 36 of apressure roller 37, shown more particularly in FIG. 5. Each of these pressure rollers, which may be of a tough resilient plastics material, is formed with a series of equally spacedcircumferential grooves 38 separated byannular ribs 39 of which two succeeding ribs, indicated at 39a, are of somewhat lesser diameter than the others. Each of therollers 37 extends for some distance through itsopening 34 to approach, but not contact, therotatable core 20. Theroller shafts 36 are engaged in thebearing blocks 35 for adjustment, radially with respect to thecore 20, by means ofadjustment screws 40. - The
tube forming strip 41, shown in section in FIG. 5, is an extruded strip with abase 42 withside flanges 43 having hooked extremities, and with a series of T-section flanges 44 between theside flanges 43 in equally spaced arrangement corresponding to the spacing of thepressure roller grooves 38. - A roll (not shown) of the
tube forming strip 41 may be carried on a reel (not shown), from which an end of the strip is carried to astrip guide 45 mounted in front of thebase plate 10, in laterally adjustable manner, on a pair ofbrackets 46. Thestrip guide 45 directs the tube forming strip downwards and more or less tangentially, with respect to theouter sleeve 18, to pass through the opening 34 of one of thepressure rollers 37 and between that pressur roller and therotatable core 20. Thestrip guide 45 is also arranged obliquely, as shown in FIG. 1, to direct the tube forming strip to the helical path along which thepressure rollers 37 are arranged and onto that part of thecore 20 encircled by the rubber or likegirdle 23. The tread of this girdle is in the form of grooves which are substantially parallel to the axes of thepressure rollers 37. - Rotation of the
core 20 causes thetube forming strip 41 to pass around the core in a helical path so that, after the completion of one rotation of thecore 20 two parts of the strip lie closely adjacent, as shown in FIG. 5, the adjacent hookedside flanges 43 of the two parts of the strip being located in thegroove 38 between the two reduced-diameterannular ribs 39a of apressure roller 37. Theopening 34 through which thetube forming strip 41 is introduced from thestrip guide 45 is of increased width, as shown in FIG. 1, to give easy entry; and the far edge of each of theopenings 34 is bent outwardly, as shown particularly at 46 in FIG. 3, to ensure that the strip, during its travel, does not become blocked, but is guided between thecore 20 and theouter sleeve 18. - When a convolution of the helical path of the
tube forming strip 41 has been completed, the two adjacent parts of the strip are locked together by alocking strip 47 which may be fed from a reel (not shown) to alocking strip guide 48 adjacent to thestrip guide 45. Thelocking strip 47, as shown in FIGS. 5 and 6, is of open arrow-head configuration, with oppositely directed base flanges, and is capable of being pressed down onto, and locking together, the two adjacent hookedside flanges 43 of the two parts of thetube forming strip 41. The locking strip is applied by feeding it, from thelocking strip guide 48, through theopening 34 of the first of thepressure rollers 37 and between itsannular ribs 39a, the reduced diameters of which allow for the thickness of the base flanges of the locking strip superimposed on thebase portions 42 of the adjacenttube forming strips 41. - For better interconnection of the convolutions of the tube forming strip, it is preferred that glue be introduced into the open arrow-head part of the locking strip. This is done by a
glue nozzle 49 extending radially into the round-section passage 50 in thelocking strip guide 48 through which the locking strip passes. Theglue pump 32 draws glue from a reservoir (not shown) by way of ahose 51 and delivers it under pressure to the nozzle through ahose 52. - With continued rotation of the
core 20 the helically woundtube forming strip 41, its adjacent convolutions locking and adhesively secured together by thelocking strip 47, form, between the rotatingcore 20 and theouter sleeve 18, a tube of which the internal diameter is determined by the diameter of the core. This tube, as it is formed, is expelled from the open end of theouter sleeve 18, thetreaded girdle 23 preventing circumferential slippage on the core but allowing axial slippage of the formed tube over the core's girdle and its polished front part. - The working parts of the machine behind the
base plate 10 are shielded by achain guard 53. - The machine may be used to line a sewer. When the formation of a tube has been commenced, as described, the machine may be lowered by a winch or the like into a manhole, aligned with the sewer, and put into operation to form a lining tube which is impelled forwardly into the sewer. Because of its compact form the machine can be installed for this purpose without deepening or widening the manhole.
- If it is required to produce a tube of greater or lesser diameter from the strip, the machine may be quickly and easily modified by the interchanging of the
core 20 and outer sleeve 18 (with its associated parts) for others of larger or smaller diameter. The core may be removed by unbolting itsmedian plate 22 from themain shaft flange 17, and the outer sleeve may be removed by unbolting itsinternal flange 19 from thebase plate 10. - Although the operation of the machine has been described and illustrated with reference to the production of tube from the extruded
plastic strip 43 and thelocking strip 47, it will, with minor modifications, be found very suitable for the production of tube from the well-known plastic strip sold under the trade mark "Rib Loc". Strip of this character is used without a locking strip being required as the rib and groove formations of adjacent convolutions of the helix become interlocked under pressure applied radially with respect to the helix. If thecircumferential grooves 38 of thepressure rollers 37 conform to the ribs of the "Rib Loc" strip, it is necessary only that each roller have one, instead of two, of the reduced-diameterannular ribs 39a. If it should be desired that the joint of succeeding convolutions of the helix should be made more secure and gas- and water-tight, theglue nozzle 49 is arranged to inject the glue into the longitudinal groove of the strip. - The invention will be found to be very effective in achieving the objects for which it has been devised, and minor modifications of constuctional detail and design which will be readily understood by skilled persons are considered to lie within the scope of the invention hereinafter claimed.
Claims (10)
- A machine for winding tubes from strip of resilient material having longitudinal side flanges (43) and a series of spaced longitudinal flanges (44) and interlocking the side flanges (43) by a longitudinal recessed locking strip (47) of resilient material, which machine includes:
a base (10);
a substantially cylindrical core (20) mounted rotatably on the base (10) and defining the internal diameter of a tube to be formed;
means (24) for rotating the core (20);
an annular outer sleeve (18) mounted on the base (10) coaxially about the core (20) and forming an annular space (21) between them;
an inlet opening (34) in the sleeve (18) to the annular space (21);
means (45) for guiding a tube forming strip (41) through the inlet opening (34) to the annular space (21);
a series of pressure rollers (37) mounted on the sleeve (18) in a helical path and entering the annular space (21) to urge the tube forming strip (41) into frictional engagement with the rotating core (20) and to guide it to form about the core (20) a helix with closely adjacent convolutions; and
means (48) for guiding a longitudinal recessed locking strip (47) of resilient material as locking means for locking together the said adjacent convolutions through the inlet opening (34) to the adjacent convolutions of the tube forming strip (41); and
a series of spaced circumferential grooves (38), separated by annular ribs (39), about the pressure rollers (37), in which the spaced longitudinal flanges (43) can be engaged and thereby guided;
the pressure rollers (37) being arranged to press the locking strip (47) into locking engagement about the adjacent side flanges (43) of the convolutions. - A machine according to claim 1, wherein means (49) are provided for injecting glue into the longitudinal recess of the locking strip (47) prior to its entering the inlet opening (34).
- A machine according to claim 1 or claim 2, wherein the core (20) is encircled by a girdle (23) of resilient material treaded with ribs substantially perpendicular to the convolutions of the helically-wound tube forming strip (41).
- A machine according to any one of the preceding claims, wherein each pressure roller (37) is mounted on the outer sleeve (18) for adjustment in a direction radial to the core (20).
- A machine according to claim 1, including:
a normally upright base plate (10);
a main shaft (14), its axis perpendicular to the base plate (10), rotatable in bearings (13) on the base plate (10);
a cylindrical core (20) mounted on the main shaft (14);
a motor (24) on the base plate (10) for driving the main shaft (14);
a series of pressure rollers (37), having spaced circumferential grooves (38) separated by annular ribs (39) mounted on the outer sleeve (18) in a helical path to which their axes are perpendicular, each of the pressure rollers (37) entering the annular space (21) through an opening (34) in the sleeve (18), one such opening (34) being an inlet opening (34);
a guide (48) on the base plate (10) for guiding a tube forming strip (41), of resilient material through the inlet opening (34) of the annular space (21) for frictional engagement between the core (20) and the pressure rollers (37) which, upon rotation of the core (20), guide the tube forming strip (41) to form about the core (20) a helix with closely adjacent convoultions, longitudinal side flanges (43) and spaced longitudinal flanges (44) on the tube forming strip (41) being engaged and guided by the spaced circumferential grooves (38); and
a locking strip guide (48) on the base plate (10) for guiding a longitudianlly recessed locking strip (47), of resilient material, through the inlet opening (34) to the annular space (21), the pressure rollers (37) pressing the locking strip (47) into engagement about the adjacent flanges of succeeding convolutions of the tube forming strip. - A machine according to claim 5, wherein glue applying means (49) are mounted on the base plate (10) for injecting glue into the longitudinal recess of the locking strip (47) prior to its passage through the inlet opening (34).
- A machine according to claim 4, claim 5 or claim 6, wherein:
the shafts (36) for the pressure rollers (37) are inclined to the axis of the core (20);
the pressure rollers (37) are of tough resilient material and have two succeeding annular ribs (39a) of lesser diameter than the remaining annular ribs (39) to engage and press the locking strip (47) into locking engagement with the side flanges of the convolutions. - A machine according to claim 5, claim 6 or claim 7, wherein the core (20) is encircled by girdle (23) of resilient material treaded with ribs substantially perpendicular to the convolutions of the helically-wound tube forming strip (41).
- A machine according to any one of claims 5 to 8, wherein each pressure roller (37) is mounted on the outer sleeve (18) for adjustment in a direction radial to the core (20).
- A method of winding a tube from strip, including the steps of:
introducing a tube forming strip (41) into the annular space (21) between a fixed cylindrical outer sleeve (18) and a cylindrical core (20) rotating coaxially within the outer sleeve (18);
guiding the tube forming strip (41) by pressure means on the sleeve and entering the annular space (21), to form about the rotating core (20) a helix with closely adjacent convolutions; and
introducing a locking strip (47) into the annular space (21) and into engagement with the adjacent edge portions of the said adjacent convolutions.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPH916686 | 1986-11-26 | ||
AU9166/86 | 1986-11-26 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0332654A1 EP0332654A1 (en) | 1989-09-20 |
EP0332654A4 EP0332654A4 (en) | 1989-09-26 |
EP0332654B1 true EP0332654B1 (en) | 1992-10-21 |
Family
ID=3771914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88900062A Expired - Lifetime EP0332654B1 (en) | 1986-11-26 | 1987-11-26 | Method of and machine for winding tubes from strip |
Country Status (6)
Country | Link |
---|---|
US (1) | US4963211A (en) |
EP (1) | EP0332654B1 (en) |
AU (1) | AU598625B2 (en) |
DE (1) | DE3782342T2 (en) |
HK (1) | HK111593A (en) |
WO (1) | WO1988003865A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU601307B2 (en) * | 1987-09-16 | 1990-09-06 | Danby Pty Ltd | Method of forming a tube |
US5778936A (en) | 1996-07-30 | 1998-07-14 | Danby Of North America | Full flow winding machine |
US5785456A (en) | 1996-09-11 | 1998-07-28 | Danby Of North America | Material and method for lining pipes |
EP0868983A1 (en) * | 1997-03-28 | 1998-10-07 | Antonio Carra | Tube in wood material and process for manufacturing the same |
US7007887B2 (en) * | 2003-11-11 | 2006-03-07 | Sonoco Development, Inc. | Tubular core with polymer plies |
CN201592916U (en) * | 2009-11-09 | 2010-09-29 | 华瀚科技有限公司 | Belt conveying mechanism |
CN108262936B (en) * | 2016-12-31 | 2024-04-09 | 浙江双林机械股份有限公司 | Organ type pinch roller structure and working method |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2731040A (en) * | 1953-03-02 | 1956-01-17 | Hoover Co | Flexible hose |
DE1073190B (en) * | 1957-04-18 | 1960-01-14 | Berlin-Dahlem Werner Mittag | Method and device for the production of hoses made from a profiled plastic strip wound with a screw thread |
US3865146A (en) * | 1974-03-22 | 1975-02-11 | Johns Manville | Helically wound tubing and method of forming the same |
FR2312356A1 (en) * | 1975-05-30 | 1976-12-24 | Inst Francais Du Petrole | Mandrel for producing curved profiles from bonded filaments - to produce specific curvatures in unlimited lengths |
US4308082A (en) * | 1977-10-18 | 1981-12-29 | Rib Loc (Hong Kong) Ltd. | Method of forming a tubular article |
US4209043A (en) * | 1977-10-18 | 1980-06-24 | Rib Loc (Hong Kong) Ltd. | Plastic tubular objects |
US4167645A (en) * | 1977-11-14 | 1979-09-11 | Dayco Corporation | Electrical current-carrying fluid hose construction |
FR2465581A1 (en) * | 1979-09-25 | 1981-03-27 | Pont A Mousson | CONTINUOUS MANUFACTURE OF PLASTIC TUBES BY HELICOIDAL WINDING |
US4375381A (en) * | 1980-07-07 | 1983-03-01 | Steward Plastics, Inc. | Two piece extruded hose |
US4420019A (en) * | 1982-04-05 | 1983-12-13 | Dillon Joseph C | Flexible, non-kinkable hose and method for making the same |
US4490200A (en) * | 1982-04-05 | 1984-12-25 | Dillon Joseph C | Flexible, non-kinkable hose and method for making the same |
AU567690B2 (en) * | 1982-09-27 | 1987-12-03 | Serpentine Corp. | Flexible duct forming apparatus and method |
US4714508A (en) * | 1986-03-25 | 1987-12-22 | Alopex Industries, Inc. | Fixture and method for making spiral wound hose |
-
1987
- 1987-11-26 EP EP88900062A patent/EP0332654B1/en not_active Expired - Lifetime
- 1987-11-26 DE DE8888900062T patent/DE3782342T2/en not_active Expired - Fee Related
- 1987-11-26 AU AU10483/88A patent/AU598625B2/en not_active Expired
- 1987-11-26 WO PCT/AU1987/000403 patent/WO1988003865A1/en active IP Right Grant
- 1987-11-26 US US07/362,454 patent/US4963211A/en not_active Expired - Fee Related
-
1993
- 1993-10-21 HK HK1115/93A patent/HK111593A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO1988003865A1 (en) | 1988-06-02 |
EP0332654A1 (en) | 1989-09-20 |
DE3782342D1 (en) | 1992-11-26 |
DE3782342T2 (en) | 1993-03-04 |
HK111593A (en) | 1993-10-29 |
US4963211A (en) | 1990-10-16 |
AU598625B2 (en) | 1990-06-28 |
EP0332654A4 (en) | 1989-09-26 |
AU1048388A (en) | 1988-06-16 |
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